btaher20's profile - activity

Hi everybody
I am using Logitech and I got camra calibrated results

camera matrix
512.674949 0.000000   315.382678
0.000000   510.413978 205.677427
0.000000   0.000000   1.000000

projection
511.625946       0.000000       313.445886   0.000000
0.000000         511.368134     204.690908   0.000000
0.000000         0.000000       1.000000     0.000000

distortion
0.047498 -0.123536 -0.000940 -0.002017 0.0000

board size : 15 by 11 and square 70 mm or 0.007 m Could any body tell me that results is acceptable with this parameters.

Best Taher

Problem with Ubuntu 64 bits 14.04.LTS After using " sudo apt-get update && sudo apt-get install ros-electric-desktop-full or only using :sudo apt-get install ros-electric-desktop-full " I get error this. E: Unable to correct problems, you have held broken packages.

I try to solve this problem by following these below command in Terminal: sudo apt-get upgrade sudo apt-get update sudo apt-get update --fix-missing

But still I get same Error in Ubuntu 14.04.LTS system. Could any body give any helpful tips to get rid of this problem.

 CMake Error at rpg_vikit/vikit_common/CMakeLists.txt:26 (FIND_PACKAGE):
  By not providing "FindSophus.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "Sophus", but
  CMake did not find one.

  Could not find a package configuration file provided by "Sophus" with any
  of the following names:

    SophusConfig.cmake
    sophus-config.cmake

  Add the installation prefix of "Sophus" to CMAKE_PREFIX_PATH or set
  "Sophus_DIR" to a directory containing one of the above files.  If "Sophus"
  provides a separate development package or SDK, be sure it has been
  installed.


-- Configuring incomplete, errors occurred!
See also "/home/btaher20/catkin_ws/build/CMakeFiles/CMakeOutput.log".
Invoking "cmake" failed

After that,I add

set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR})
find_package(Eigen3 REQUIRED)
include_directories(${EIGEN3_INCLUDE_DIR})

But still same error

How to solve it? Would you any body give link.

Hi All I am using ROS_indigo for Tracking marker based camera poses.I Have camera poses

          x                          y                                   z

0.121479289178 -0.106297347731 1.62793653837
0.786298557045 0.402245846399 1.54599247475
0.786059675294 -0.113879785059 1.58497680159
0.121330147186 -0.107066288802 1.62733927345
0.121800479286 -0.106119046842 1.62937524479 UI want to transform these point in WGS-84 or ENU co-ordinate frame from local.Could anybody let me know how I can do that means In ROS or any Papers that I can follow for standard positioning transformation.

Thanks in advance.

Best Taher

Hi All I am Using ROS_indigo for Tracking marker based camera pose.I get TF values with given(in Rviz like I give fix frame marker_42,Ref Frame Marker _42) and I am getting my camera pose when moving my Camera.This works upto FOC of camera around 1 meter.I want to any body inform me how can I use this Rviz to track all markers while fixing may be 42. I am giving screen short.

Marker settings .jpg

by fixing marker_42 as ( 0,0,0) position for camera ,I want to get position of my camera pose upto marker_17 .How Can I do that.I am using TF but that does not work. rosrun tf tf_echo /ar_marker_42 /camera.I get by using my configuration

Maximum Tx.png

gives me 98 cm in x direction tracking as I am interest in x+ direction moving. How can I get Pose upto Marker_17.Could any body give any hinds.

Thanks in advance.

Best Taher

Hi everybody I am using ROS indigo for Marker detection and Transformation results in Camera farme.Screenshot from 2016-07-08 09_32_38.png I have two way to get values.But I do not know how to save my values in rostopic echo /tf results that I see in window : in text file

second from this----- rosrun tf tf_echo /ar_marker_9 /camera, command I can save in text files but I get 30 same values(t same, same x,y,z) in one second.But I want one second one results that is clear in messege.

wqw.jpg that I can see in my window but when I save it have differnt files I save with comamnd:rostopic echo -p /tf_echo /ar_marker_9 /camera > data.txt

Could you any body tell me what is wrong here.

Best Taher

Hello I got Transformation+ Rotation results With rostopic Screenshot from 2016-07-05 11:51:10.png

.But I want these results in a file or in text or any other format to use further.

Best Taher

Hello Janidu I used quite a long time where exactly I can find these option to solve this problem .Yes It will not be automatically saved Markers pose.I have to give command or time steps to save my Markers Pose I means How Can I do that. I carefully checked Rviz user manual and other options but did not find yet the way to save pose results in text file or any format. Would you mind to give link or any thing that I should maintain. I am using ROS Indigo.

Best Taher

Hi I would like to know how to save Rviz results in text file or any other format.Could any body give me feedback.

Screenshot from 2016-06-24 11_44_20.png

I want to save these x,y,z and alpha,beta,ghamma results as a text file.

Could any body let me know how can I do that

Best
TaherScreenshot from 2016-06-24 11_44_20.png(/upfiles/14676522631575838.png)

Edit: Hello Janidu I used quite a long time where exactly I can find these option to solve this problem .Yes It will not be automatically saved Markers pose.I have to give command or time steps to save my Markers Pose I means How Can I do that. I carefully checked Rviz user manual and other options but did not find yet the way to save pose results in text file or any format. Would you mind to give link or any thing that I should maintain. I am using ROS Indigo.

Hi everybody I am using ROS Indigo Package and using this site for ARtags detection https://github.com/astups/artag

I got My Marker position detection and orientation is there any user manual about full parameterization system of these 12 detected Screenshot from 2016-04-13 18:22:16.pngparameters value . Markers-- parents Relative position and Orientation with respect to Camera/ Markers .what is their Unit ?

My all parameter value just jumps,I need stable results for x,y,z values and How Can I get that.

Would any body suggest me to do that.Thanks in Advance

.Due to this problem I am confused about my results

Best Taher

Hello everyone I am using Artags alvar but when I use command

"rosrun rviz rviz -d rviz_artag_config.rviz"

I get window but with Camera Status warn,Image status Warn no image captured by camera. I use camera usb logitech.Could you inform me what should I do now

Thanks in advance

Best Taher

EDIT

Hello I am using Logitech camera by using usb_camera usb_camera.launch file witgh Package brown_ros_usb_pkg for Ros_indigo system.I checked with /devVideo 0 or 1,The Error still there.

<launch>
    <node name="usb_cam" pkg="usb_cam" type="usb_cam_node" output="screen" >
        <param="" name="video_device" value="/dev/video1"/>
    </node>
</launch>

But I get error in Camera Calibration Waiting for service', '//set_camera_info,Service not found.

and now in visualizing the Ar_tags_alvar.I sucessfully build alvar and using ROS_indigo packages.

Best Taher